a. Using another mobile network SIM.

If your device is registered to one (1) network (e.g. Orange), remove the SIM and insert another mobile network’s SIM (e.g. Zain) to you device. Run your USB Modem’s Dashboard / Software and a small window will appear prompting you to enter the unlock code. So, enter the correct unlock code and your modem is unlocked.

(Note: Most of the time, you dashboard will not prompt you that your device is unlocked, nonetheless, your device/USB modem is indeed unlocked and it is already OPENLINE.)

b. Using Nextgen’s Huawei Modem Code Tool

c. Using HUAWEI MODEM Code Writer by Sagmaster

Download the software from the link below. Plug in your USB modem then run "HUAWEI MODEM Code Writer.exe" it should detect your modem. Now click the Unlock Modem button and enter the unlock code you received.

http://rapidshare.com/files/381666323/HUAWEI_MODEM_Code_Writer.rar